Obsidian stone specimen for education. Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsi

---

Obsidian stone specimen for education. Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly.

---

Size: 5092px × 3395px
Photo credit: © Witthaya Khampanant / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: agate, age, arrow, arrowhead, background, ball, beautiful, black, blade, brittle, cave, cavity, crystal, cutting, dark, early, eruption, extrusive, felsic, flows, fracture, geode, geologic, geology, glass, hard, jasper, lava, material, obsidian, onyx, opaque, ornamental, pebble, piercing, polymerization, precious, prehistoric, rock, sharp, smoky, specimen, stone, texture, tooling, translucent, vitreous, volcanic, volcano